Screw



FIG. 1 is a perspective view of the design of a screw;

FIG. 2 is a back plan view of the screw shown in FIG. 1;

FIG. 3 is a front plan view of the screw shown in FIG. 1;

FIG. 4 is a top side view of the screw shown in FIG. 1;

FIG. 5 is a back side view of the screw shown in FIG. 1;

FIG. 6 is a left side view of the screw shown in FIG. 1; and,

FIG. 7 is a right side view of the screw shown in FIG. 1.

Any features shown in broken lines depict environmental subject matteronly and form no part of the claimed design.

CLAIM The ornamental design for a screw, as shown and described.